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Solar data for Italy

Across the 597 places in Italy the best fixed tilt for solar panels runs from 30° in Palermo to 42° in Bolzano, and flat ground gets 3.5 to 4.9 peak sun hours a day. Every number is computed for each place.

Solar power in Italy at a glance

Averages over 597 places with climate data, for a fixed array facing south.

Best panel angle34°average, facing south
Peak sun hours4.18a day on flat ground
1 kWp makes1,452kWh a year at the best angle
Off-grid angle65°average, for the darkest month
RomePozzallo (most sun)
  • 3.51–3.79
  • 3.79–4.07
  • 4.07–4.35
  • 4.35–4.63
  • 4.63–4.91

Peak sun hours a day on flat ground. Each dot is one place.

The sunniest places in Italy, with 4.91 peak sun hours a day on flat ground, are Pozzallo and one other place; the least sunny is Bressanone with 3.51. A 1 kWp array at its best angle makes from 1,325 kWh a year in Gorizia to 1,629 kWh in Porto Empedocle — 1,452 kWh on average.

The best year-round tilt runs from 30° in Palermo to 42° in Bolzano. Off-grid systems are sized for the darkest month and do better steeper, at 65° on average: at 70° that month brings 2.13 kWh per kWp a day in Ravenna and 3.17 kWh in Palma di Montechiaro.

Size an off-grid system or open any place below for its sun path, monthly table and tilt curve.

Sunniest places in Italy

Ranked by peak sun hours on flat ground: the yearly average of a day's sunshine energy (NASA POWER climatology). Output: 1 kWp at its best year-round angle.

RankPlaceRegionSun hours/daykWh per kWp a yearBest tilt
1PozzalloSicily4.911,62730°
1PachinoSicily4.901,62630°
3Porto EmpedocleSicily4.891,62930°
3ScicliSicily4.891,62430°
5AgrigentoSicily4.881,62630°
5Palma di MontechiaroSicily4.881,62630°
5LicataSicily4.881,62430°
5RosoliniSicily4.881,61930°
5ModicaSicily4.881,61830°
10FavaraSicily4.871,62230°

Least sunny places in Italy

RankPlaceRegionSun hours/daykWh per kWp a yearBest tilt
592BellunoVeneto3.621,33539°
594SondrioLombardy3.611,35640°
595BolzanoTrentino-Alto Adige3.571,37542°
596MeranoTrentino-Alto Adige3.531,35742°
597BressanoneTrentino-Alto Adige3.511,33941°

Solar by region in Italy

Averages of the places in each region, sunniest first. Darkest month: what 1 kWp of off-grid panels at 70° makes a day in the worst month of the year.

RegionPlacesSun hours/daykWh per kWp a yearBest tiltDarkest month at 70°Sunniest place
Sicily624.791,59330°3.07 kWhPozzallo
Sardinia154.631,56832°2.90 kWhCarbonia
Calabria154.531,52131°2.83 kWhReggio Calabria
Campania874.441,51733°2.78 kWhGragnano
Lazio464.391,51134°2.78 kWhMarina di Ardea-Tor San Lorenzo
Apulia634.381,48832°2.65 kWhCasarano
Basilicate24.341,47432°2.73 kWhMatera
Molise34.231,45733°2.68 kWhTermoli
Umbria74.121,43334°2.59 kWhTerni
Abruzzo134.111,42034°2.58 kWhSan Salvo
Tuscany384.101,43135°2.48 kWhPiombino
Liguria114.051,43236°2.61 kWhVentimiglia
The Marches164.001,38534°2.37 kWhSan Benedetto del Tronto
Emilia-Romagna353.911,36935°2.29 kWhCasalecchio di Reno
Piedmont413.801,38838°2.65 kWhMondovì
Veneto383.781,34637°2.32 kWhRovigo
Lombardy913.771,35838°2.42 kWhVoghera
Aosta Valley13.691,38339°2.68 kWhAosta
Friuli Venezia Giulia73.681,33037°2.32 kWhMonfalcone
Trentino-Alto Adige63.611,35841°2.66 kWhRiva del Garda

Largest places in Italy at a glance

PlaceLatitudeBest tiltOff-grid tiltSun hours/day (flat)
Rome41.9° N34°66°4.42
Milan45.5° N37°64°3.79
Naples40.9° N33°65°4.45
Turin45.1° N38°64°3.79
Palermo38.1° N30°62°4.76
Genoa44.4° N36°64°3.97
Bologna44.5° N35°62°3.94
Florence43.8° N35°67°4.03
Bari41.1° N33°64°4.35
Catania37.5° N30°62°4.71
Verona45.4° N37°69°3.79
Messina38.2° N30°62°4.67
Trieste45.6° N36°68°3.73
Padua45.4° N36°69°3.81
Brescia45.5° N37°65°3.77
Taranto40.5° N32°64°4.46
Parma44.8° N36°63°3.88
Prato43.9° N35°67°4.03
Modena44.6° N36°62°3.91
Reggio Calabria38.1° N30°62°4.67

Daylight and clock time in Italy

In Bressanone (46.7° N), the northernmost place, the longest day of the year lasts 15 h 51 min and the shortest 8 h 33 min; in Pachino (36.7° N), the southernmost, 14 h 41 min and 9 h 39 min. The clocks change twice a year: forward on Sun 29 Mar, back on Sun 25 Oct (Europe/Rome).

Time zonePlacesUTC offsetClocks change in 2026
Europe/Rome597UTC+1, in summer UTC+2Forward on Sun 29 Mar, back on Sun 25 Oct

Questions about solar in Italy

What is the best angle for solar panels in Italy?
Facing south, between 30° and 42° depending on the place — 34° on average over 597 places. Off-grid systems that must get through the darkest month do better steeper, at about 65° on average.
How many peak sun hours does Italy get?
From 3.5 hours a day in Bressanone to 4.9 in Pozzallo on flat ground, averaged over the year; 4.2 on average.
How much electricity does 1 kWp of solar panels produce in Italy?
About 1,452 kWh a year at the best fixed angle on average, from 1,325 kWh in Gorizia to 1,629 kWh in Porto Empedocle. These are long-term climate averages; a single year can be several per cent higher or lower.
Where is the sunniest place in Italy?
Pozzallo (Sicily) and 1 other place share the most sun of the 597 places: 4.91 peak sun hours a day on flat ground. 1 kWp in Pozzallo makes about 1,627 kWh a year.
Does Italy use daylight saving time?
The clocks change twice a year: forward on Sun 29 Mar, back on Sun 25 Oct (Europe/Rome).
How long is the longest day in Italy?
15 h 51 min in Bressanone; the shortest day lasts 8 h 33 min in Bressanone.

All places in Italy

Aosta Valley

Basilicate